OverlayDismissAnimator  108 content/browser/web_contents/aura/overscroll_navigation_overlay.cc   DISALLOW_COPY_AND_ASSIGN(OverlayDismissAnimator);
OverlayDismissAnimator  178 content/browser/web_contents/aura/overscroll_navigation_overlay.cc     (new OverlayDismissAnimator(layer.Pass()))->Animate();